FLT CTL Panel Flashcards
What does ELAC stand for?
Elevator Aileron Computer
How many ELAC’s on the Airbus?
2
What are the functions of the ELAC?
- Normal elevator
- Normal aileron
- Normal pitch and roll
- Alternate pitch
- Direct pitch and roll
- Abnormal alt
- Aileron droop
- Autopilot orders
Under Normal Law, what does ELAC 1 control?
- Primary - Aileron control (roll)
- Standby - Elevator / Stabilizer control (backs up ELAC 2)
- Provides 5° aileron droop
Under Normal Law, what does ELAC 2 control?
- Primary - Elevator / Stabilizer (pitch)
* Standby - Aileron control (backs up ELAC 1)
What backs up ELAC 2?
ELAC 1 -> SEC 2 -> SEC 1
What does SEC stand for?
Spoiler Elevator Computer
How many SEC’s are installed?
3
What functions are performed by the SEC’s?
- Normal roll (by controlling the spoilers)
- Speedbrakes and ground spoilers
- Alternate pitch (SEC 1 and SEC 2 only)
- Direct pitch (SEC 1 and SEC 2 only)
- Direct roll
- Abnormal attitude.
Under Normal Law, what do the 3 SEC’s control?
- Primary – Spoiler control (roll)
* Standby – Elevator / Stabilizer control (SEC 1 & 2 back up the ELAC’s)
What is the sole purpose of SEC 3?
Spoiler control
What does FAC stand for?
Flight Augmentation Computer
How many FAC’s are installed?
2
What are the functions of the FAC’s?
- Rudder Trim
- Rudder travel limit
- Yaw control
- Flight Envelope Protection – vertical
- Windshear Protection
- Low Energy Warning Protection
- Alpha Floor Protection
- PFD speed scale
Under Normal Law, what do the FAC’s provide (YAWL)?
- Yaw Control – Damping and turn coordination, rudder limiter, rudder trim)
- Airspeed Protection Computation (Alpha Prot, high / low limits, maneuvering speed, PFD speed scale)
- Windshear protection (Reactive windshear)
- Low Energy Warning Protection (“Speed, speed, speed”)
Is full rudder deflection available during all flight regimes?
No. Rudder deflection is limited as a function of airspeed.
What is the computer and priority for the Ailerons?
ELAC 1 -> ELAC 2
What is the computer and priority for the Elevator and Stabilizer?
ELAC 2 -> ELAC 1 -> SEC 2 -> SEC 1
How are the flight control surfaces controlled and actuated?
All surfaces are controlled electrically and actuated hydraulically
When is automatic pitch trim available?
In flight under Normal law with bank angle less than 33° with or without autopilot engaged
If the active elevator actuator fails, what occurs?
Control is transferred to the other actuator
How is roll control normally achieved?
1 aileron and 4 spoilers on each wing
If both FAC’s fail, is maximum rudder deflection available?
Yes, after slat extension
